package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements Ioperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书");

        System.out.println("请输入要删除的图书名：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();

        int index = -1;
        int currentSize = bookList.getUsedSize();
        for(int i = 0; i < currentSize; i++) {
            Book book = bookList.getPos(i);
            if(name.equals(book.getName())) {
                index = i;
                break;
            }
        }

        if(index == -1) {
            System.out.println("未找到该图书");
            return;
        }

        for(int i = index; i < currentSize - 1; i++) {
            Book book = bookList.getPos(i + 1);
            bookList.setBooks(book, i);
        }

        bookList.setBooks(null, currentSize - 1);
        bookList.setUsedSize(currentSize - 1);

        System.out.println("删除成功");
    }
}
